POAM III observations of the anomalous 2002 Antarctic ozone hole

Hoppel, K. W.; Bevilacqua, R. M.; Allen, Douglas R.; Nedoluha, Gerald E.; Randall, C. E.

doi:10.1029/2003gl016899

Cited by 81 publications

(102 citation statements)

References 15 publications

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“…The year 2001 was characterized by a relatively large ozone hole that remained up to mid-December. Then in the year 2002, a remarkably high planetary wave activity took place in the Southern Hemisphere, which contrasted with previous years (Allen et al,5340 A. F. Pazmiño et al: Increased UV radiation at Southern Sub-polar Latitudes the first stratospheric major warming ever observed in the Southern Hemisphere (Hoppel et al, 2003;Randall et al, 2005;Scaife et al, 2005). In the middle and high stratosphere, the air masses rich in ozone from mid-latitudes were transported to the Polar Regions (Kondragunta et al, 2005).…”

Section: Introductioncontrasting

confidence: 51%

Increased UV radiation due to polar ozone chemical depletion and vortex occurrences at Southern Sub-polar Latitudes in the period [1997–2005]

et al. 2008

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Abstract.The variability of total ozone and UV radiation from Total Ozone Mapping Spectrometer (TOMS) measurements is analyzed as a function of polar vortex occurrences over the southern subpolar regions during the 1997-2005 period. The analysis of vortex occurrences showed high interannual variability in the 40 • S-60 • S latitude band with a longitudinal asymmetry showing the largest frequencies over the 90 • W-90 • E region. The impact of vortex occurrences on UV radiation and ozone in clear sky conditions was determined from the comparison between the measurements inside the vortex and a climatology obtained from data outside the vortex over the studied period. Clear sky conditions were determined from TOMS reflectivity data. For measurements outside the vortex, clear sky conditions were selected for reflectivity values lower than 7.5%, while for measurements inside the vortex, a relaxed threshold was determined from statistically similar UV values as a function of reflectivity. UV changes and ozone differences from the climatology were analyzed in the 40 • S-50 • S and 50 • S-60 • S latitude bands during the spring period (September to November). The largest UV increases and ozone decreases, reaching ∼200% and ∼65%, Correspondence to: Andrea Pazmino (andrea.pazmino@aero.jussieu.fr) respectively, were found in the 50 • S-60 • S latitude band in September and October. The heterogeneous ozone loss during vortex occurrences was estimated using a chemical transport model. The largest impact of vortex occurrences was found in October with mean UV increase, total ozone decrease and accumulated ozone loss in the 350-650 K range of, respectively, 47%, 30% and 57%. The region close to South America is the most affected by the Antarctic ozone depletion due to the combined effect of large number of vortex occurrences, lower cloud cover and large ozone decrease. This region would be the most vulnerable in case of cloud cover decrease, due to more frequent occurrence of ozone poor air masses during austral spring.

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Section: Introductioncontrasting

confidence: 51%

Increased UV radiation due to polar ozone chemical depletion and vortex occurrences at Southern Sub-polar Latitudes in the period [1997–2005]

et al. 2008

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“…In particular, the anomalously weak ozone hole in 2002 (Hoppel et al, 2003;Feng et al, 2005;Roscoe et al, 2005) is not reproduced in the Tier 1.4 database.…”

Section: Validationmentioning

confidence: 99%

A vertically resolved, global, gap-free ozone database for assessing or constraining global climate model simulations

Bodeker

Haßler

Young

et al. 2013

Earth Syst. Sci. Data

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Abstract. High vertical resolution ozone measurements from eight different satellite-based instruments have been merged with data from the global ozonesonde network to calculate monthly mean ozone values in 5• latitude zones. These "Tier 0" ozone number densities and ozone mixing ratios are provided on 70 altitude levels (1 to 70 km) and on 70 pressure levels spaced ∼ 1 km apart (878.4 hPa to 0.046 hPa). The Tier 0 data are sparse and do not cover the entire globe or altitude range. To provide a gap-free database, a least squares regression model is fitted to the Tier 0 data and then evaluated globally. The regression model fit coefficients are expanded in Legendre polynomials to account for latitudinal structure, and in Fourier series to account for seasonality. Regression model fit coefficient patterns, which are two dimensional fields indexed by latitude and month of the year, from the N-th vertical level serve as an initial guess for the fit at the N + 1-th vertical level. The initial guess field for the first fit level (20 km/58.2 hPa) was derived by applying the regression model to total column ozone fields. Perturbations away from the initial guess are captured through the Legendre and Fourier expansions. By applying a single fit at each level, and using the approach of allowing the regression fits to change only slightly from one level to the next, the regression is less sensitive to measurement anomalies at individual stations or to individual satellite-based instruments. Particular attention is paid to ensuring that the low ozone abundances in the polar regions are captured. By summing different combinations of contributions from different regression model basis functions, four different "Tier 1" databases have been compiled for different intended uses. This database is suitable for assessing ozone fields from chemistry-climate model simulations or for providing the ozone boundary conditions for global climate model simulations that do not treat stratospheric chemistry interactively.

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“…The stationary part of the wave structure in the Southern Hemisphere (SH) spring stratosphere is mainly determined by a planetary wave with zonal number 1 (Hartmann et al, 1984;Quintanar and Mechoso, 1995;Ialongo et al, 2012), i.e., wave 1. The role of planetary waves was especially important in the unusual SH stratospheric warming in 2002 (Varotsos, 2002;Allen et al, 2003;Hoppel et al, 2003). Both wave-1 and wave-2 activity during austral winter and spring caused strong deceleration and warming of the stratospheric polar vortex, its anomalous splitting and ozone hole breakup in September 2002 (Varotsos, 2002;Nishii and Nakamura, 2004;Newman and Nash, 2005;Peters et al, 2007;Grassi et al, 2008;Peters and Vargin, 2015).…”

Section: Introductionmentioning

confidence: 99%

Evolution of the eastward shift in the quasi-stationary minimum of the Antarctic total ozone column

et al. 2017

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Abstract. The quasi-stationary pattern of the Antarctic total ozone has changed during the last 4 decades, showing an eastward shift in the zonal ozone minimum. In this work, the association between the longitudinal shift of the zonal ozone minimum and changes in meteorological fields in austral spring (September-November) for 1979-2014 is analyzed using ERA-Interim and NCEP-NCAR reanalyses. Regressive, correlative and anomaly composite analyses are applied to reanalysis data. Patterns of the Southern Annular Mode and quasi-stationary zonal waves 1 and 3 in the meteorological fields show relationships with interannual variability in the longitude of the zonal ozone minimum. On decadal timescales, consistent longitudinal shifts of the zonal ozone minimum and zonal wave 3 pattern in the middle-troposphere temperature at the southern midlatitudes are shown. Attribution runs of the chemistry-climate version of the Australian Community Climate and Earth System Simulator (ACCESS-CCM) model suggest that long-term shifts of the zonal ozone minimum are separately contributed by changes in ozone-depleting substances and greenhouse gases. As is known, Antarctic ozone depletion in spring is strongly projected on the Southern Annular Mode in summer and impacts summertime surface climate across the Southern Hemisphere. The results of this study suggest that changes in zonal ozone asymmetry accompanying ozone depletion could be associated with regional climate changes in the Southern Hemisphere in spring.

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POAM III observations of the anomalous 2002 Antarctic ozone hole

Cited by 81 publications

References 15 publications

Increased UV radiation due to polar ozone chemical depletion and vortex occurrences at Southern Sub-polar Latitudes in the period [1997–2005]

Increased UV radiation due to polar ozone chemical depletion and vortex occurrences at Southern Sub-polar Latitudes in the period [1997–2005]

A vertically resolved, global, gap-free ozone database for assessing or constraining global climate model simulations

Evolution of the eastward shift in the quasi-stationary minimum of the Antarctic total ozone column

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